M2. A machine is made up of 3 components: an upper part, a middle part, and a lower part. The machine is then assembled. 5 percent of the upper parts are defective, 4 percent of the middle parts are defective, and 1 percent of the lower parts are defective. What is the probability that a machine is not defective? a) 0.1000 b) 0.9029 c) 0.8000 d) 0.0002 e) 0.7209 M3. The manager of the local grocery store has determined that, on average, 4 customers use the service desk every half-hour. Assume that the number of customers using the service desk has a Poisson distribution. What is the probability that during a randomly selected half- hour period, exactly 2 customers use the service desk? a) 0.1483 b) 0.0916 C ) 0.1465 d) 0.9084 e) 0.7619